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Toujeo Side Effects

Common Toujeo Side Effects and Tips for Handling Them

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According to the American Diabetes Association, 38.4 million Americans live with diabetes, and many rely on injectable treatments to help control blood sugar. Toujeo is one such option, offering long-lasting insulin support for people with type 1 or type 2 diabetes. While it’s effective, it’s important to know that Toujeo side effects can occur, and understanding them can help you use the medication more confidently.

In this guide, we’ll explore the most common reactions, how to manage them, and when you should contact your healthcare provider. 

What Is Toujeo?

Toujeo is a brand of insulin glargine, a long-acting insulin that helps keep blood sugar stable throughout the day and night. It is delivered using a pre-filled pen called the SoloStar. This makes it one of the more convenient injectable diabetes medications for daily use.

Unlike short-acting insulin, this medication works slowly over 24 hours or more, reducing the number of injections you need. It is prescribed for both adults and children with diabetes who require long-term insulin therapy.

What Are The Side Effects Of Toujeo Insulin 

Like all medications, this insulin can cause side effects, although not everyone experiences them. The most common Toujeo insulin side effects include:

  • Mild redness, inflammation, or swelling at the injection site
  • Low blood sugar (hypoglycemia)
  • Headache or dizziness
  • Mild weight gain
  • Slight fluid retention

These reactions are often temporary and can improve as your body adjusts to the medication. Still, it’s important to track any symptoms and inform your healthcare provider.

Less Common but Serious Side Effects

While rare, some side reactions require immediate medical attention. These include:

  • Severe allergic reactions like rash, swelling, or difficulty breathing
  • Extreme low blood sugar causing confusion, seizures, or unconsciousness
  • Sudden vision changes
  • Signs of heart failure, like rapid weight gain or shortness of breath

If you experience these, contact your doctor right away.

Long-Term Side Effects 

Some people may wonder about the long term side effects of Toujeo. While the medication has been proven safe for most users, prolonged use may increase the risk of:

  • Mild weight gain over time
  • Injection site changes, such as skin thickening
  • Repeated episodes of low blood sugar if dosing is not adjusted correctly

Your doctor will monitor your blood sugar levels regularly and may adjust your dose to minimize these risks.

Tips for Handling Toujeo Side Effects

You can take simple steps to reduce discomfort and keep your treatment on track:

Rotate Injection Sites

Repeatedly injecting in the same spot can cause skin changes. Rotate between recommended insulin injection sites such as the abdomen, thighs, or upper arms.

Monitor Blood Sugar Closely

Regular testing helps detect patterns and prevent severe highs or lows. Keeping a log can also help your provider adjust your dose more accurately.

Stay Hydrated and Eat Balanced Meals

Maintaining a steady carbohydrate intake and drinking water throughout the day can help stabilize blood sugar and reduce side effects.

When to Call Your Doctor

You should seek medical advice if:

  • Side effects worsen or interfere with daily life
  • You experience repeated low blood sugar despite adjustments
  • You notice swelling in your legs or sudden breathing difficulties

Your healthcare provider can help recognize if the side effects are temporary or if your treatment plan needs to change.

Ready To Learn More About Toujeo?

If you’re starting Toujeo or experiencing new symptoms, talk with your healthcare provider. They can guide you in managing side effects effectively while ensuring your diabetes remains under control. Ask about lifestyle changes, dosing strategies, and whether another insulin option might be better for you.

Visit our Toujeo Product Page to learn more about its availability online and purchase options.

Takeaways

Toujeo side effects are usually mild and manageable, especially with the right approach. Most people tolerate the medication well, and for many, the benefits of stable blood sugar outweigh the risks. With proper monitoring, dose adjustments, and communication with your doctor, you can continue your treatment safely and confidently.

Frequently Asked Questions (FAQs)

Is Toujeo the same as Lantus?

Both are long-acting insulins, but Toujeo has a more concentrated formula, which can affect dosing and duration. 

How long does Toujeo take to start working?

It begins lowering blood sugar within a few hours and can last for more than 24 hours. 

Can I use Toujeo if I’m pregnant?

Only under medical supervision. Your doctor will assess the risks and benefits for your specific case. 

How to use your SoloStar insulin?

To use SoloStar, follow the instructions provided with your device. Ensure you are trained properly to administer the insulin correctly. 

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Written by CDI Staff Writer on August 12, 2025

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